Difference between revisions of "Isoëtes tegetiformans"
Ann. Missouri Bot. Gard. 68: 100. 1978.
Common names: Mat-forming Melin's grass
Treatment appears in FNA Volume 2.
FNA>Volume Importer |
imported>Volume Importer |
||
| (4 intermediate revisions by 2 users not shown) | |||
| Line 33: | Line 33: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Isoëtes tegetiformans | name=Isoëtes tegetiformans | ||
| − | |||
|authority=Rury | |authority=Rury | ||
|rank=species | |rank=species | ||
| Line 47: | Line 46: | ||
|publication year=1978 | |publication year=1978 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_124.xml |
|genus=Isoëtes | |genus=Isoëtes | ||
|species=Isoëtes tegetiformans | |species=Isoëtes tegetiformans | ||
Latest revision as of 20:21, 5 November 2020
Plants becoming terrestrial. Rootstock horizontally elongate, mat-forming, often proliferous. Leaves deciduous to nearly evergreen, bright green, pale toward base, distichously arranged, to 4 cm, pliant, gradually tapering to tip. Velum covering entire sporangium. Sporangium wall unpigmented. Megaspores dark gray, 275–370 μm diam., tuberculate with low and distinct tubercules; girdle obscure. Microspores brown in mass, 26–33 μm, spinulose. 2n = 22.
Phenology: Spores mature late winter and spring.
Habitat: Shallow pools on granite outcrops
Discussion
Isoëtes tegetiformans is a unique mat-forming quillwort distinguished by its distichous leaf arrangement, horizontally elongate rootstock, and nondichotomous roots. (See discussion under I. melanospora.)
Of conservation concern.
Selected References
None.
Lower Taxa
None.